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895 Jarvis Drive <br /> Seuoia Morgan Hil40 77 95037 <br /> 4Dq (408)77b 9640 <br /> 2-6308 <br /> 1W Analytical wwseFAX uoia08) abscom <br /> www sequoialabs com <br /> Secor- Rancho Cordova(ARCO) Project ARCO#2133, Stockton,CA MPCO261 <br /> 3017 Kilgore Rd Suite 100 Project Number Arco#2133,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Brian Carey 04/04/06 13 28 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Mote <br /> AS-10-S-23-060227(MPCO261-03REl)Soil Sampled 02/27/06 08 47 Received 03/04/06 08 00 CL <br /> Xylenes(total) 13 50 mg/kg 100 6C12002 03/12/06 03/25/06 EPA 8260B <br /> Gasoline Range Organics(C4-C12) 280 250 " 11 " " <br /> 11 <br /> Surrogate 1,2-Dichlaroethane-d4 103% 55-135 " " " H <br /> AS-10-SD-23-060227(MPCO261-04)Soil Sampled 02/27/06 08 48 Received 03/04/06 08 00 <br /> terl-Atnyl methyl ether ND 00050 mg/kg 1 6C10044 03/10/06 03/11/06 EPA 8260B <br /> Benzene - ---- - — - - -00069 - `00050 - <br />_tert-Butyl alcohol ND 0 020 <br /> Di-isopropyl ether ND 0 0050 " -` <br />--1;2=Dibromcethane(EDB)"---- -- -ND - 0 0050- - - - ---- - - -- - - " - - - - - - - <br /> 1,2-Dtchloroethane ND 0 0050 " <br /> Ethanol ND 010 " <br /> Ethyl tert-butyl ether ND 00050 <br /> Methyl tert-butyl ether ND 00050 " <br /> Toluene 0 020 00050 " <br /> Surrogate 12-Dichloroelhane-d4 95% 60-125 _ <br /> Ethylbenzene 052 0 I0 2 6C12002 03/12/06 03/25/06 " <br /> Xylenes (total) 6 6 0 10 " <br /> Gasoline Range Organics(C4-C12) 130 5 0 " <br /> Surrogate 12-Dtchloroethane-d4 100% 55-135 " <br /> Chlorobenzene ND 00050 6C10044 03/10/06 03/11/06 <br /> 1,2-Dichlorobenzene ND 00050 " <br /> 13-Dichlorobenzene ND 00050 <br /> 14-Dichlorobenzene ND 00050 " <br /> Surrogate 4-Bromofluorobenzene 107% 75-120 " <br /> Sequoia Analytical - Morgan Hill The results in this rcpori apply to the samples analyzed in accordance with the chainof <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 7 of 20 <br />